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  1. #1
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    Default belt tension

    hi all,

    just a quick one - is there a definitive method for checking belt tension?



    it can deflect a little bit, and i can twist it about 40 degrees. 1100mm duct.









    cheers,

    toby

  2. #2
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    Default Re: belt tension

    With an HTD belt that will be fine.



    Cheers.



    Andy.


  3. #3
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    Default Re: belt tension

    a general rule of thumb is if you can twist it 90 easily it's too slack, if you can get a note by twanging it it's too tight



    yours looks fine

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    Default Re: belt tension

    Hi,



    You should be able to twist it 90 degrees but no more. A lot of people run them too tight which increases belt and pulley wear.



    I personally would say yours is just a little bit too tight........





    Nick

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    Default Re: belt tension

    Nice lookin craft, post a full pic for us to see when it is done.



    Its all shinny

  6. #6
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    Default Re: belt tension

    looks similar to my tension at the mo



    thats what ive been doing all evening, ive about 20-30mm deflection on the belt, and can twist it to about 40 degrees too



    will have to do a comparison



    quick Q, how many teeth on your bottom pulley? and where did you get it



    it looks very similar to my bottom pulley, but mines a taperlock, and fits the opposite way to yours is , (yours is what i,d like:))



    mart

  7. #7
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    Default Re: belt tension

    It's got one washer thickness for shims at the moment. without the washer it's too slack and with 2 washers it's twangy. I might be able to find something a tiny bit thinner i guess.

    I'll just run it a bit and if it starts getting too hot I can reduce the tension. Do they stretch at all which may loosen it?



    just another question:

    the duct is ever so slightly oval shaped - it needs the top pushing towards the left (looking head on) to make it a perfect circle. Any ideas how i can achieve this please???

    I have tried moving it with the flow straighteners but they don't do a very good job.



    cheers!

  8. #8
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    Default Re: belt tension

    sorry missed the last post - i can't quite remember how many on the bottom pulley (the tops one's 54)

    Its K&M pulley - Ken mounted it onto the bearing block, so i believe he machined it with taper..?



    how do you mean it fits the opposite way?




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